Kawaguchi International Patent Office
川口 義雄
Public patent records for Kawaguchi International Patent Office, 1978–2025: 2,649 patent families shared with other firms for 177 clients (applicants). Sign in to explore the app’s partner network, selected filing periods, filing activity, and client relationships.
- Patent families shared with other firms
- 2,649
- 1978–2025. One family can be counted more than once.
- Activity 2016–2020
- 710
- Distinct families per year, summed over the last five complete years. 2021 onward is still being published.
- Clients (applicants)
- 177
- Applicants named on these families, all recorded years. Not a full client list.
- Firms shown below
- 5
Activity trend (2017–2026)
- Scope
- Kawaguchi International Patent Office · Japan
- Filing years
- 2017–2025
- Unit
- Distinct families per year
2021–2026 are preliminary. Patent filings publish about 18 months after filing, and foreign filings can enter later, so these counts are still filling in.
Each family counts once within a year. A family may recur in multiple years.
View annual counts
| Year | Distinct families per year |
|---|---|
| 2017 | 99 |
| 2018 | 116 |
| 2019 | 211 |
| 2020 | 211 |
| 2021 · preliminary | 194 |
| 2022 · preliminary | 202 |
| 2023 · preliminary | 113 |
| 2024 · preliminary | 30 |
| 2025 · preliminary | 2 |
Frequently associated firms
Firms that most often appear on the same patent families. One family can be counted more than once, so these are not unique totals.
Similar Japan firms
Yearly counts since 1990, added up. One family can be counted more than once.
- UNIUS Patent Attorneys Office弁理士法人ユニアス国際特許事務所2,658 shared patent families
- Takada & Takahashi International Patent Office弁理士法人高田・高橋国際特許事務所2,614 shared patent families
- Ueyanagi Patent Office上柳特許事務所2,691 shared patent families
- Eikou Patent Office特許業務法人栄光特許事務所2,600 shared patent families
- Kyosei International Patent Office特許業務法人共生国際特許事務所2,699 shared patent families
Compare Kawaguchi International Patent Office side by side with
Explore the workspace profile
Open the app’s partner network, filing-year filters, and filing activity for Kawaguchi International Patent Office. App counts follow the filing years and corridors you choose, so they can differ from this public profile.
Filing activity
Recorded patent families across the filing years you choose.
Full partner list
Every observed counterpart for the filing period you choose.
Named clients
Applicant relationships behind the exchange counts.